Grinding machine



Dec "Y zsm R. D. GARDNER GRINDING MACHINE Original Filed April 10, 192g Patented Dec. 17 1925.

UNITED STATES 1,563,901 PATENT OFFICE.

RALPH D. GARDNER, OF BELOIT, WISCONSIN, ASSIGNGR OF ONE-THIRD TO EDWARD B. GARDNER .AND ONE-THIRD TO JOHN NIELSEN.

GRINDING MACHINE.

Original application led April 10, 1922, Serial No. 551,008. Divided and this application filed .Tune 28,

1923. Serial No. 648,216.

To all whom t may concern.'

Be lit known that I, RALPH D. GARDNER, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Grinding Machines, of which the following is a specification.

This invention pertains to grinding machines, and the present application constitutes a division of my prior application, Ser. No. 551,008, filed April 10, 1922.

One of the primary purposes of my present invention is to provide an adjustable mounting` whereby the grinding wheel carrying standard of a grinding machine may be adjusted upon its reciprocatory carriage for the purpose of aligning the grinding wheel.

While the principles of my invention may be employed in grinding machines of various characters, the machine herein shown, for illustrative purposes merely, is a grinding machine comprising two opposed grind'- ing wheels adapted to simultaneously grind the opposite faces of piston rings, and the like.

The principles of the invention, and many of the inherent advantages thereof will be best understood by reference to the following description, when considered in connection with the accompanying drawings.

Referring to the drawings:

Fig. 1 is a rear elevation of ya grinding machine embodying my invention;

Fig. 2 is a sectional view on the line 2--2 of Fig. 1; and

Fig. 3 is a sectional view on the line 3 3 of Fig. 1. v

The machine, as illustrated, comprises a base 4i, provided with guideways on its upper face on which are mounted to reciprocate longitudinally a pair of carriages 5. Upon each carriage is mounted a standard G in which is journaled a shaft 7 equipped with a driving pulley 8, and at its inner end with a grinding wheel 9, the wheels being disposed in opposed relation to grind the opposite faces of objects interposed between them.

In order that the grinding' faces ofthe two wheels may be disposed in exact parallelism, it lis desirable to adjust the standards 6 upon their respective carriages 5, and it is desirable that this adjustability provide not only Yfor Ahorzontal angular adjustment, but also for vertical angular adjustment. With this end in View, each car-4 riage 5 is provided adjacent its inner end with a pair of spaced bearing bosses or pads 1.1 and 12, adapted to support the standard 6 at its inner end. Immediately above each pad` the standard is provided with a slot 13 through which a bolt 14 eX- tends into the carriage, as will be apparent from Fig. 3. By loosening these bolts, lateral movement of the inner end of the standard may be effected.

The outer end of each standard is provided wjith a horizontal extension 15, forming a boss which rests upon an elevated bearing boss or pad 16 formed on the carriage, and this boss forms the support for the outer end of the standard.

The boss is vertically cored and tapped, as will be apparent from Fig. 2, to receive a plug' 17, threaded thereinto and adapted to be projected beneath the boss and to rest upon the boss or pad 16. A. bolt 18, extending through the boss and threaded into the carriage 5, serves to clamp the parts and lock them securely together. Above the pad, and beneath the head of the bolt, there is disposed a nut 19 constructed to receive a Spanner wrench, and provided with pins 21 projecting downwardly into a groove 22, formed in the upper end of the plug 17. It will be apparent' that when the bolt `18 is loosened, the plug-17 may be adjusted upwardly or downwardly by simply turning the nut 19, and when the required adjustment has been made, the parts may be locked in adjusted position by tightening up the bolt 18.

The outer end, therefore, of each standard is supported upon a plug 17, while its inner end is supported upon a straight line bearing formed by the pads 11 and 12. Should it be desirable to adjust the outer end of the standard vertically, the bolts 13 and 18 are loosened, whereupon the plug 17 is adjusted vertically to dispose the shaft 7 and the grinding wheel carried thereby in proper position. Should lateral adjustment of the shaft be desirable, the inner end of the standard is moved laterally upon the pads 11 and 12. This movement may be accomplished manually rf desired, but I have provided for an accurate adjustment by forming upon the carriage 5 at each side -,and some little .diistanoe inwardly `from the bossli," an upwardly projeetingyear 23, in which 1s disposed a set screw 24. These set screws engage opposite sides of the standardA 6, and' by.: loosening one: and; tightening the otherythe standard may be aboutthe-bolt 18L as a fulcrulm andi that itmay. be adjusted vertically aboutl the bearingV bossesI or pads.T andk 12- as,v` a fulcrum. This u niversaladjustment, cou- 1 pled with. the. finev degreeo'f adjustabilityv which. mayf be seculedthrouglitheplug 17 and- .through manipulation of: the; adjusting screws 24, provides al, machine which has great .delicacy and accuracy. lof adjustment,

1 therebyenabling tho-grindingWheels tobe aligned and adjustednvith absoluteaccuracy.

The structural details illust-rated and described are.- obviously capable of .considerable 7 modification. and, variation Without departing. from the essence of the'. invention-7 as. deinedin the. following. el aims,4 i

I cla-iin: i

1. In a grindingl machine, the combination A,of a base,. a'ipairv.. of Acarriages mounted to slideithereon, aipair ofzgrinding Wheels, and means for adjustably. mounting said Wheels upon their. respective carriages so as toA permit. of-` adjustmentA oit said-Wheels about.l a plurality.,` of;y axes.` upon their carriages.l i

`2. Ina. grindinggmachinef thercombinaT tion. off-fa)` basefa carriage slidably mounted thereon a standard7'. ai shftzj ourliale-dqvtliere in, a grinding. wheel-carried; bysaidfshat, an adjnstableconnectionbetweenisaidfstandi ard and saidl carriage, andjgmeans for adjust:- ingsaidf standard relativel-y. ftol .thecari-i'age about aI plurality oi''axes perpe ndicul'arly to saidz'sh'aft'.

' 3:.: In aVY grinding machineyl the combina.:-

tionof a carriage, la shaft carrying standard, a base, andmeans for adjustably connecting saidstandard to said base so as to permit off-bothk vertical4 and` lateraladjustment thereof. 'l

4. Ina grinding machine, the combination of a carriage, a grinding Wheel shaft supporting: standard mounted thereonl pro vided at one end with a hollouT boss and at its other end with a pair of slots, bolts extending throughsaid-slotsinto saidcarriage, an; adjustable plugy threaded into l said boss andprojeotingfbeneatlr thesanie to forma support therefor,` a boltfor vclamping said boss to.- sai-d carriage, and means whereby saidplug may: be adjusted 1 Without removal of saidbolt. v

5. Ina grinding.v machine, the combina.- tion of' a f-carriage, a shaft supporting. stand-` ard', aV vertically adjustable .pivotal connection between one end. of: said standard and said: carriage,l anda laterallyadjustable connection g between-1 the other end of saidv standf ard and said carriage.

6;. In a., grinding machine, the combina: tionof" a carriage, astandard, supported thereby', means for" adjustingr one end of said standard vertically relatively` to said carriage,- andY means Jfor,adjusting the other end of said standard horizontally relatively tosaid carriage.V

7; In: a. grindingmachine,- the combination of;r acarriageprovidedswith a pair oi? transyerselyy aligned supporting, pads adj af centoneend and* asingle supporting pad adjacent the other end, a standard adapted to: be supported:upon-f,said pads'A means Afor pivo'tally" 'connecting.` one end,y of` Vsaid standardzto saidsinglepad, meansior slidabl:ya-connectirngLtherotherl end of said; stand# ard tosaidf-pair ofapadsymeansrfr vertically adjusting one endofsthestandardupon said single; pad, and'l means for locking said standardfinl'adjusteel-position..

" RALPH-1D. GARDNER.. 

